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https://issues.apache.org/jira/browse/DAFFODIL-1512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dave Thompson reopened DAFFODIL-1512:
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> dfdl prefix properties on dfdl annotation elements should generate useful
> diagnostic
> ------------------------------------------------------------------------------------
>
> Key: DAFFODIL-1512
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1512
> Project: Daffodil
> Issue Type: Bug
> Components: Diagnostics, Front End, Usability
> Reporter: Mike Beckerle
> Priority: Major
> Fix For: 3.1.0
>
>
> A common mistake is to move short-form annotations with the dfdl: prefix from
> elements into the dfdl:format annotation. But then one forgets to remove the
> prefix dfdl: since the attributes of the dfdl:format annotation are not
> prefixed. So this is an error: {code}
> <dfdl:format dfdl:lengthKind="delimited" ..../>
> {code}
> When what was intended is{code}
> <dfdl:format lengthKind="delimited".... />
> {code}
> Daffodil should issue a specific diagnostic whenever it finds dfdl: prefixed
> attributes in the annotation elements dfdl:format, dfdl:element,
> dfdl:simpleType, dfdl:sequence, dfdl:choice, etc.
> It should point out specifically that the author probably wanted to remove
> the prefix dfdl:
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